无工频变压器整流级稳定机理与控制策略研究  

Stability Mechanism and Control Strategy Research on Rectifier Level of Non-power Frequency Transformer

作　　者：胡敬朋[1] 张国澎[2] HU Jingpeng;ZHANG Guopeng(School of Mechanical Electronic and Information Engineering, China University of Mining and Technology,Beijing 100083;School of Electrical Engineering and Automation, Henan Polytechnic University,Jiaozuo 454000 China)

机构地区：[1]中国矿业大学(北京)机电与信息工程学院,北京100083 [2]河南理工大学电气工程与自动化学院,河南焦作454000

出　　处：《湘潭大学自然科学学报》2017年第4期73-76,共4页Natural Science Journal of Xiangtan University

基　　金：国家自然科学基金项目(51077125)

摘　　要：通过对工频变压器级联式多电平变换器整流级单位功率因数运行的稳定工作区机理分析,找到决定直流侧电容电压能否平衡的边界条件点.当三相系统每相输出的功率不相等时,采用整流级各级联H桥直流电压平衡控制策略,在整流级交流侧注入零序电压,平衡三相相间的直流侧电压.这种策略较好地解决了相间电压的平衡问题,减小了不平衡负载对电网的影响.By mechanism analysis of stable operating area of unit power factor about cascade multilevel converter of non power frequency transformer rectifier,CHBR DC side key capacitor voltage balance point of the boundary conditions is found.DC voltage balance control strategy of all levels of rectifier H bridge is adopted to solve the voltage balance problem through zero sequence voltage injecting rectifier AC side to balance three phase DC side voltage.The control strategy can better solve the problem of voltage balance between phases to decrease the influence of unbalanced load on power grid.

关 键 词：无工频变压器 级联式多电平 整流级 

分 类 号：TM41[电气工程—电器]